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Nikola Tesla

Nikola Tesla was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his work on alternating-current (AC) electrical systems.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 27, 2026|2 min read| Fact-checked

Nikola Tesla was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his work on alternating-current (AC) electrical systems. He made major contributions to electrical power, radio technology, and high-voltage engineering, and is widely regarded as one of the most important inventors in history.

Early life and education

Tesla was born in 1856 in Smiljan, then part of the Austrian Empire, in a Serbian family. He studied engineering and later moved to the United States in 1884.

Electrical inventions and AC power

Tesla’s best-known work was on alternating-current power systems, including the rotating magnetic field and polyphase AC transmission. These ideas helped make long-distance electric power distribution practical.

Other inventions and research

Tesla also worked on the Tesla coil, radio-related technologies, high-frequency electricity, and devices such as the AC induction motor. He held many patents and gave demonstrations that influenced later technologies.

Later life and legacy

Tesla’s later years were financially difficult, and he died in New York City in 1943. He is remembered as a major figure in the history of electricity and invention.

Key facts

  • Tesla helped develop the modern AC electricity supply system.
  • He discovered and patented the rotating magnetic field, a foundation of AC machinery.
  • He invented the Tesla coil in 1891.
  • His work influenced radio communication, electric motors, and power transmission.
  • He immigrated to the United States in 1884 and worked with Thomas Edison and George Westinghouse.
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Canadian context

Tesla is relevant to Canadian readers through his lasting influence on the electrical grid, power engineering, radio, and modern technology used in Canada, and his legacy is studied in science and engineering education.

Frequently asked questions

Who was Nikola Tesla?
Nikola Tesla was a Serbian-American inventor and electrical engineer known for his work on alternating-current power systems and other electrical technologies.
What did Nikola Tesla invent?
He is credited with inventions and developments including the AC induction motor, the rotating magnetic field, the Tesla coil, and key parts of polyphase AC power systems.
How old was Nikola Tesla when he died?
Tesla died in 1943 at age 86.
What happened to Nikola Tesla?
He spent his later years in New York City, where he lived in relative obscurity and financial hardship before dying in a hotel room in 1943.
Did Nikola Tesla have a wife?
No reliable biographical source in the provided results indicates that Tesla ever married; he is generally described as having no wife.
What is Nikola Tesla famous for?
He is most famous for helping develop the modern AC electricity system and for his influential work in electrical engineering and radio-related technology.

References

  1. Encyclopaedia Britannica — https://www.britannica.com/biography/Nikola-Tesla
    Supports: Birth, death, Serbian-American identity, AC power system, rotating magnetic field, Tesla coil, and major inventions
  2. Wikipedia — https://en.wikipedia.org/wiki/Nikola_Tesla
    Supports: Basic biographical dates and broad description of Tesla's work
  3. National Inventors Hall of Fame — https://www.invent.org/inductees/nikola-tesla
    Supports: Induction, induction motor, rotating magnetic field, and AC power transmission
  4. U.S. Department of Energy — https://www.energy.gov/articles/top-11-things-you-didnt-know-about-nikola-tesla
    Supports: Tesla's influence on modern technologies and AC electricity
  5. Carnegie Mellon University — https://www.cs.cmu.edu/~tesla/
    Supports: Biography, AC systems, wireless communication, and historical significance
  6. PBS — https://www.pbs.org/tesla/prodo/po_whonikola.html
    Supports: AC power systems, Tesla coil, and broader impact on electricity and communications